Bolt and speed nut therefor



Sept. 22, 1936. P. F. 3m. 2,055,166

BOLT AND SPEED NUi THEREFOR Filed Aug. 15, 1955 Patented Sept. 22, 1936 V K i UNITED STATES PATENT OFFICE BOLT AND 81222 3531 Paul F. Berry, Columbus, Ohio I Application August 15, 1935, Serial No. 36,421

1 Claim. (01. ass-e6) V This invention relates to a bolt and speed nut ginal portion of a plate 8, the periphery of which therefor, and it is an object of the invention to is defined b a flange. 9 extending outwardly provide-a bolt and nut of this kind with means from the pla e 8 when in working position. The whereby the nut can be readily and quickly apcentral portion of this plate 8 is provided with an 5 plied but can only be removed upon destruction. elongated slot I through which the shank or The invention consists in the details of constem l of the bolt may readily pass, and'at oppostruction and in the combination'and arrange: site sides of this slot are the diametrically ment of the several parts of my improved bolt opposed smaller slots il. Overlying the applied and speed nut therefor whereby certain imporplate 8 is a second plate l2 which snugly fits l0 tant advantages are attained and the device within the field defined by the flange 9 of the 10 rendered simpler, less expensive and otherwise plate 8. The flange 9 extends beyond the outer more convenientand advantageous for use, as face of the applied plate l2 whereby the outer. will be hereinafter more fully set forth. marginal, portion of the flange I' may be clinched I The novel features of my invention will herein inwardly over the flange 9 of the plate 8 for after he definitely claimed. holding said plate firmly in place and also mainl6 In order that my invention may be the better taining the plate l2 in position. This plate I2 is understood, I will now proceed to describe the provided with diametrically opposed slots l4. same with reference to the accompanying drawwhich register with the slots ll of the plate 8 ing, wherein:- and struck from the central portion of the plate Figure 1 is a view partly in section and partly li and between the slots ll are the inwardly 20 in elevation illustrating a bolt and speed nut disp dand utw rdly in in d fin s r lu s therefor constructed in accordance with an em- Th se l ii are ir inwardly h bodiment of my invention; I slot l0 in the plate 8 whereby the speed nut may Figure 2 is a. fragmentary sectional view taken e re ily ppl e h Stem Shank l but substantially on the line 2-2 of Figure 1; the engagement of the fingers or lugs I with the Figure 3 is a fragmentary view in plan of one' threads I willtefiectively held the p e nut of the closure plates comprised in the construcagainst retract n ndw s mov m nt ut w l tion of the speed nut; so engage the threads 4 to allow the nut S to be Figure 4 is a view in plan of the second plate t ad 0 8 the Stem Shank comprised in the structure of the speed nut and Th ci ul r p h d threads w v pr 30 which plate carries bolt engaging members; vide means whereby the speed nut S is prevented Figure 5 is a view in plan of the third plate from being threaded entirely off of the shank or comprised in the structure of the speed nut; and stem I so that in order to remove the nut it will Figure 6 is a fragmentary detailed sectional be necessary that the same be mutilatedg 5 view taken substantially on the line 6-6 of Within the S p of the threads 4 the ut S 35 Figure 1. can be wrenched or otherwise turned to perform As disclosed in the accompanying drawing, my i s bin in fu nimproved bolt comprises a shank I provided at A n referring to t nut after the plate I! one extremity with a head 2. The outer or free has been positione a thi plate is POSitiened 40 end portion of the shank or stem I of the bolt t e eo er. sai a e being p e erably o a thick- 40 is provided with a series of circular or'straight n ss reater than ith f t plat s 8 or I so pitched threads 3 concentric to the axis of the t added r h wil e iv n to w hstand shank or stem I. The periphery of the shank Strain imposed up the fin rs 0r lu s This or stem I inwardly of these threads or grooves 3 plate I6 has a central opening I hr Which 5 isprovided witharegular or spiral pitched thread the free d De the Stem Shank 4 which extends to a point closely adjacent toad ly pass s. 'At d a t a y ppes d p nts the head 2. g the plate It has struck therefrom fingers I8 which Coacting'with the shank or stem 1 is a speed are adapted" to be forced through the registernut S and as herein disclosed said nut comprises 8 Openings H end clinched Ov r the inner a shell 5 of what might be termed an acorn type face of the applied plate 8 whereby all three of 50 having an open face defined by anoutstandlng the plates 8, Hand l6 are effectively connected flange 6. The periphery of this flange 6 is de- 7 and in a manner to assure maximum strength. fined by a second flange 1 at right angles thereto The plate l6 constitutes what can be termed a and which initially is straight in cross section. clinchinglandlockingplate. This plate clinches i The flange I has seated thereagainst the marand locks the shell 5 and the plates 8 and I2 5 y in desired assembled relation and this plate l6 also prevents the lugs or engaging members l5 of the plate l2 springing outward and protects the same against tamper to release the bolt. It is to "be further noted that the opening I! in the plate It snugly receives the shank or stem l of the bolt thereby permitting. the plate iii to havesuch binding strength to necessitate the destruction of the nut to efi'ect its removal.

From the foregoing description it is thought to be obvious that a bolt and speed nut therefor constructed in accordance with my invention is particularly well adapted for use by reason of the convenience and facility with which it may be assembled and operated, and it will also be obvious that my invention is susceptible of some change and modification without departing from .the principles and spirit thereof and for this 30 lying plates disposed across the open face of the shell and lapping the defining flange; the outer marginal portion of the flange of the shell having means coacting with the plates for holding the plates in position the innermost plate in its central part having inwardly disposed lugs struck therefrom and between which the shank is insertable, the free ends of the lugs engaging the threads of the shank to permit relative threading adjustment of the shank and nut, the inserted portion of the shank being composed of two threaded portions, one permitting adjustment of the nut and bolt, the other having coaction with the lugs to prevent complete separation of the shank and nut afterthe shank has been inserted within the nut, the inner plate having a central slot to receive the lugs and of a size to permit the lugs to have required inward movement as the shank enters the nut, both of the plates at op posite sides of the lugs and slot having registering openings, and a reinforcing plate overlying the plate provided with the lugs and positioned at the side of such plate remote from the plate having the slot, said reinforcing plate carrying members insertible through the registering openings of the first plates to provide means for holding the last named plate in position, said reinforcing plate in its central portion having an opening through which the shank is freely insertable as the shank enters the shell.

PAUL F. BERRY. 

